科学家们一直认为羽毛最初出现在兽脚亚目恐龙的某个早期成员身上，该成员最后进化为鸟类。

Until recently it was thought that feathers first appeared in an early member of the lineage of theropods that leads to birds.

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科学家们一直认为羽毛最初出现在兽脚亚目恐龙的某个早期成员身上，该成员最后进化为鸟类。

Until recently it was thought that feathers first appeared in an early member of the lineage of theropods that leads to birds.

youdao